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Method for identifying substance by simulating dual energy X-ray imaging by utilizing Monte Carlo method

A technology of X-ray and X-ray spectrum, which is applied in the fields of nuclear radiation exploration, geophysical measurement, measuring device, etc., can solve the problem of low material identification accuracy, and achieve the effect of improving the inspection accuracy and reducing the false alarm rate.

Inactive Publication Date: 2012-09-12
TECHN PHYSICS INST HEILONGJIANG ACADOF SCI
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  • Application Information

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Problems solved by technology

[0004] The present invention aims to solve the problem of low material identification accuracy in the current security inspection process, thereby providing a method for material identification using Monte Carlo method to simulate dual-energy X-ray imaging

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  • Method for identifying substance by simulating dual energy X-ray imaging by utilizing Monte Carlo method
  • Method for identifying substance by simulating dual energy X-ray imaging by utilizing Monte Carlo method
  • Method for identifying substance by simulating dual energy X-ray imaging by utilizing Monte Carlo method

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specific Embodiment approach 1

[0014] The specific embodiment one, utilize Monte Carlo method to simulate the method for material identification of dual-energy X-ray imaging, it is realized by the following steps:

[0015] Step 1. Use the Monte Carlo method to simulate the process of bombarding the tungsten target with an electron beam with an energy of 9 MeV and an energy of 6 MeV to generate bremsstrahlung and obtain an X-ray spectrum;

[0016] Step 2, collimating the X-ray spectrum obtained in step 1, scanning the sample to be tested after collimation, and obtaining a scanned image;

[0017] Step 3: Analyzing the scanned image obtained in Step 2 to obtain the identification curve of the sample to be tested, and realize the identification of the substance according to the relationship between the identification curve and the substance atoms.

[0018] The electron beam with energy of 9 MeV and energy of 6 MeV in step 1 is 0.2 cm.

[0019] In step one, the diameter of the tungsten target is 1.5 cm and the ...

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Abstract

The invention discloses a method for identifying substance by simulating dual energy X-ray imaging by utilizing a Monte Carlo method, which relates to the method for identifying the substance by utilizing the dual energy X-ray imaging and aims at solving the problem of a low substance identification rate in the current security check process. The method comprises the following steps of: step 1, simulating processes of bombarding a tungsten target by electron beams with energies being 9 MeV and 6 MeV by utilizing the Monte Carlo method, generating bremsstrahlung radiation, and obtaining an X-ray spectrum; step 2, carrying out alignment for the X-ray spectrum obtained in the step 1, scanning a sample to be detected after the alignment, and obtaining a scanning image; and step 3, analyzing the scanning image obtained in the step 2, obtaining an identification curve of the sample to be detected, and realizing the substance identification according to the relationship between the identification curve and substance atoms. The method disclosed by the invention is suitable for the security check.

Description

technical field [0001] The invention relates to a method for identifying substances. Background technique [0002] Traditional X-ray inspection technology and equipment have the advantages of reliable performance, simple operation, easy maintenance, clear and intuitive images, and low price. However, most security inspection equipment uses ordinary radiography systems for security inspections. Harder metal products such as guns and knives are easy to identify, but detecting explosives is much more difficult than detecting weapons, because the current explosion Most of the bombs are plastic bombs, and their main components are HMX (Octogen) and RDX (Hessogen). They are very easy to be camouflaged into any shape, just like our daily necessities, it is difficult to be detected by ordinary rays. detected by the imaging system. With the frequent occurrence of terrorist incidents, how to effectively and accurately detect dangerous goods hidden in the interlayer of luggage, in th...

Claims

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Application Information

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IPC IPC(8): G01V5/00
Inventor 张慧梅雪松庞杨周巍关世荣韩业辉黄龙川滕立才
Owner TECHN PHYSICS INST HEILONGJIANG ACADOF SCI
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